Summary

Glover M. Allen Animal Figures in the Maya Codices

The animal head is frequently attached to a human body. The animal may appear conventionalized to a greater or less extent and the head in turn may change in the same way until only a single characteristic of the animal remains by which to identify it as, for example, the spots of the jaguar or the feathering around the eye of the macaw. In the case of the glyphs, a term employed to designate the regular and usually square characters appearing in lines or columns throughout the codices and inscriptions, we find both the realistic drawing and that where conventionalism has come in.
Source: Gutenberg

Glover M. Allen Animal Figures in the Maya Codices

The drawings in some cases are fairly accurate, so that there is little difficulty in determining the species intended by the artist. At other times, it is hazardous to state the exact species to which the animal belongs. It is only in a comparatively small number of cases, however, that there is any great doubt attached to the identification. It will be noted that the drawings of the Dresden manuscript are much more carefully and accurately done than those of the Tro-Cortesianus. A greater delicacy and a more minute regard for detail characterize the Dresden drawings in general.
Source: Gutenberg

Glover M. Allen Animal Figures in the Maya Codices

It may also be that, simply because it was the practice to burn the dead, the dog was looked on as the Fire God’s animal and the emblem of fire, the natives got accustomed to speak of him as the messenger to prepare the way in the kingdom of the dead, and thus eventually to regard him as such. At the time when the Spaniards made their acquaintance, it was the constant practice of the Mexicans to commit to the grave with the dead a dog who had to be of a red-yellow color, and had a string of unspun cotton round his neck, and was first killed by the thrust of a dart in his throat.
Source: Gutenberg

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